31043442 has 8 divisors (see below), whose sum is σ = 62086896. Its totient is φ = 10347812.

The previous prime is 31043417. The next prime is 31043443. The reversal of 31043442 is 24434013.

It is a sphenic number, since it is the product of 3 distinct primes.

31043442 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (31043443) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2586948 + ... + 2586959.

It is an arithmetic number, because the mean of its divisors is an integer number (7760862).

Almost surely, 2^31043442 is an apocalyptic number.

31043442 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31043442 is a wasteful number, since it uses less digits than its factorization.

31043442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5173912.

The product of its (nonzero) digits is 1152, while the sum is 21.

The square root of 31043442 is about 5571.6642038084. The cubic root of 31043442 is about 314.2847363803.

Adding to 31043442 its reverse (24434013), we get a palindrome (55477455).

The spelling of 31043442 in words is "thirty-one million, forty-three thousand, four hundred forty-two".